Does Cameron Carpenter play the gayest of instruments?

It’s an old and kind of silly pastime among musicians of a certain stripe — to sit around and theorize about which instruments attract the most gay men. The topic came up a few years ago while talking with composer Ned Rorem, who had a typically confident deadpan answer: “All choir directors without exception are gay. No brass players, fewer tenors than you might think, 50 percent of baritones…” I...